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<FONT color="green">001</FONT>    /*<a name="line.1"></a>
<FONT color="green">002</FONT>     * Licensed to the Apache Software Foundation (ASF) under one or more<a name="line.2"></a>
<FONT color="green">003</FONT>     * contributor license agreements.  See the NOTICE file distributed with<a name="line.3"></a>
<FONT color="green">004</FONT>     * this work for additional information regarding copyright ownership.<a name="line.4"></a>
<FONT color="green">005</FONT>     * The ASF licenses this file to You under the Apache License, Version 2.0<a name="line.5"></a>
<FONT color="green">006</FONT>     * (the "License"); you may not use this file except in compliance with<a name="line.6"></a>
<FONT color="green">007</FONT>     * the License.  You may obtain a copy of the License at<a name="line.7"></a>
<FONT color="green">008</FONT>     * <a name="line.8"></a>
<FONT color="green">009</FONT>     *      http://www.apache.org/licenses/LICENSE-2.0<a name="line.9"></a>
<FONT color="green">010</FONT>     * <a name="line.10"></a>
<FONT color="green">011</FONT>     * Unless required by applicable law or agreed to in writing, software<a name="line.11"></a>
<FONT color="green">012</FONT>     * distributed under the License is distributed on an "AS IS" BASIS,<a name="line.12"></a>
<FONT color="green">013</FONT>     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.<a name="line.13"></a>
<FONT color="green">014</FONT>     * See the License for the specific language governing permissions and<a name="line.14"></a>
<FONT color="green">015</FONT>     * limitations under the License.<a name="line.15"></a>
<FONT color="green">016</FONT>     */<a name="line.16"></a>
<FONT color="green">017</FONT>    package org.apache.commons.lang.exception;<a name="line.17"></a>
<FONT color="green">018</FONT>    <a name="line.18"></a>
<FONT color="green">019</FONT>    import java.io.PrintStream;<a name="line.19"></a>
<FONT color="green">020</FONT>    import java.io.PrintWriter;<a name="line.20"></a>
<FONT color="green">021</FONT>    import java.io.Serializable;<a name="line.21"></a>
<FONT color="green">022</FONT>    import java.io.StringWriter;<a name="line.22"></a>
<FONT color="green">023</FONT>    import java.util.ArrayList;<a name="line.23"></a>
<FONT color="green">024</FONT>    import java.util.Arrays;<a name="line.24"></a>
<FONT color="green">025</FONT>    import java.util.Collections;<a name="line.25"></a>
<FONT color="green">026</FONT>    import java.util.Iterator;<a name="line.26"></a>
<FONT color="green">027</FONT>    import java.util.List;<a name="line.27"></a>
<FONT color="green">028</FONT>    <a name="line.28"></a>
<FONT color="green">029</FONT>    /**<a name="line.29"></a>
<FONT color="green">030</FONT>     * &lt;p&gt;A shared implementation of the nestable exception functionality.&lt;/p&gt;<a name="line.30"></a>
<FONT color="green">031</FONT>     * &lt;p&gt;<a name="line.31"></a>
<FONT color="green">032</FONT>     * The code is shared between <a name="line.32"></a>
<FONT color="green">033</FONT>     * {@link org.apache.commons.lang.exception.NestableError NestableError},<a name="line.33"></a>
<FONT color="green">034</FONT>     * {@link org.apache.commons.lang.exception.NestableException NestableException} and<a name="line.34"></a>
<FONT color="green">035</FONT>     * {@link org.apache.commons.lang.exception.NestableRuntimeException NestableRuntimeException}.<a name="line.35"></a>
<FONT color="green">036</FONT>     * &lt;/p&gt;<a name="line.36"></a>
<FONT color="green">037</FONT>     * <a name="line.37"></a>
<FONT color="green">038</FONT>     * @author Apache Software Foundation<a name="line.38"></a>
<FONT color="green">039</FONT>     * @author &lt;a href="mailto:Rafal.Krzewski@e-point.pl"&gt;Rafal Krzewski&lt;/a&gt;<a name="line.39"></a>
<FONT color="green">040</FONT>     * @author Daniel L. Rall<a name="line.40"></a>
<FONT color="green">041</FONT>     * @author &lt;a href="mailto:knielsen@apache.org"&gt;Kasper Nielsen&lt;/a&gt;<a name="line.41"></a>
<FONT color="green">042</FONT>     * @author &lt;a href="mailto:steven@caswell.name"&gt;Steven Caswell&lt;/a&gt;<a name="line.42"></a>
<FONT color="green">043</FONT>     * @author Sean C. Sullivan<a name="line.43"></a>
<FONT color="green">044</FONT>     * @since 1.0<a name="line.44"></a>
<FONT color="green">045</FONT>     * @version $Id: NestableDelegate.java 905636 2010-02-02 14:03:32Z niallp $<a name="line.45"></a>
<FONT color="green">046</FONT>     */<a name="line.46"></a>
<FONT color="green">047</FONT>    public class NestableDelegate implements Serializable {<a name="line.47"></a>
<FONT color="green">048</FONT>    <a name="line.48"></a>
<FONT color="green">049</FONT>        /**<a name="line.49"></a>
<FONT color="green">050</FONT>         * Required for serialization support.<a name="line.50"></a>
<FONT color="green">051</FONT>         * <a name="line.51"></a>
<FONT color="green">052</FONT>         * @see java.io.Serializable<a name="line.52"></a>
<FONT color="green">053</FONT>         */<a name="line.53"></a>
<FONT color="green">054</FONT>        private static final long serialVersionUID = 1L;<a name="line.54"></a>
<FONT color="green">055</FONT>    <a name="line.55"></a>
<FONT color="green">056</FONT>        /**<a name="line.56"></a>
<FONT color="green">057</FONT>         * Constructor error message.<a name="line.57"></a>
<FONT color="green">058</FONT>         */<a name="line.58"></a>
<FONT color="green">059</FONT>        private transient static final String MUST_BE_THROWABLE =<a name="line.59"></a>
<FONT color="green">060</FONT>            "The Nestable implementation passed to the NestableDelegate(Nestable) "<a name="line.60"></a>
<FONT color="green">061</FONT>                + "constructor must extend java.lang.Throwable";<a name="line.61"></a>
<FONT color="green">062</FONT>    <a name="line.62"></a>
<FONT color="green">063</FONT>        /**<a name="line.63"></a>
<FONT color="green">064</FONT>         * Holds the reference to the exception or error that we're<a name="line.64"></a>
<FONT color="green">065</FONT>         * wrapping (which must be a {@link<a name="line.65"></a>
<FONT color="green">066</FONT>         * org.apache.commons.lang.exception.Nestable} implementation).<a name="line.66"></a>
<FONT color="green">067</FONT>         */<a name="line.67"></a>
<FONT color="green">068</FONT>        private Throwable nestable = null;<a name="line.68"></a>
<FONT color="green">069</FONT>        <a name="line.69"></a>
<FONT color="green">070</FONT>        /**<a name="line.70"></a>
<FONT color="green">071</FONT>         * Whether to print the stack trace top-down.<a name="line.71"></a>
<FONT color="green">072</FONT>         * This public flag may be set by calling code, typically in initialisation.<a name="line.72"></a>
<FONT color="green">073</FONT>         * This exists for backwards compatability, setting it to false will return<a name="line.73"></a>
<FONT color="green">074</FONT>         * the library to v1.0 behaviour (but will affect all users of the library<a name="line.74"></a>
<FONT color="green">075</FONT>         * in the classloader).<a name="line.75"></a>
<FONT color="green">076</FONT>         * @since 2.0<a name="line.76"></a>
<FONT color="green">077</FONT>         */<a name="line.77"></a>
<FONT color="green">078</FONT>        public static boolean topDown = true;<a name="line.78"></a>
<FONT color="green">079</FONT>        <a name="line.79"></a>
<FONT color="green">080</FONT>        /**<a name="line.80"></a>
<FONT color="green">081</FONT>         * Whether to trim the repeated stack trace.<a name="line.81"></a>
<FONT color="green">082</FONT>         * This public flag may be set by calling code, typically in initialisation.<a name="line.82"></a>
<FONT color="green">083</FONT>         * This exists for backwards compatability, setting it to false will return<a name="line.83"></a>
<FONT color="green">084</FONT>         * the library to v1.0 behaviour (but will affect all users of the library<a name="line.84"></a>
<FONT color="green">085</FONT>         * in the classloader).<a name="line.85"></a>
<FONT color="green">086</FONT>         * @since 2.0<a name="line.86"></a>
<FONT color="green">087</FONT>         */<a name="line.87"></a>
<FONT color="green">088</FONT>        public static boolean trimStackFrames = true;<a name="line.88"></a>
<FONT color="green">089</FONT>        <a name="line.89"></a>
<FONT color="green">090</FONT>        /**<a name="line.90"></a>
<FONT color="green">091</FONT>         * Whether to match subclasses via indexOf.<a name="line.91"></a>
<FONT color="green">092</FONT>         * This public flag may be set by calling code, typically in initialisation.<a name="line.92"></a>
<FONT color="green">093</FONT>         * This exists for backwards compatability, setting it to false will return<a name="line.93"></a>
<FONT color="green">094</FONT>         * the library to v2.0 behaviour (but will affect all users of the library<a name="line.94"></a>
<FONT color="green">095</FONT>         * in the classloader).<a name="line.95"></a>
<FONT color="green">096</FONT>         * @since 2.1<a name="line.96"></a>
<FONT color="green">097</FONT>         */<a name="line.97"></a>
<FONT color="green">098</FONT>        public static boolean matchSubclasses = true;<a name="line.98"></a>
<FONT color="green">099</FONT>    <a name="line.99"></a>
<FONT color="green">100</FONT>        /**<a name="line.100"></a>
<FONT color="green">101</FONT>         * Constructs a new &lt;code&gt;NestableDelegate&lt;/code&gt; instance to manage the<a name="line.101"></a>
<FONT color="green">102</FONT>         * specified &lt;code&gt;Nestable&lt;/code&gt;.<a name="line.102"></a>
<FONT color="green">103</FONT>         *<a name="line.103"></a>
<FONT color="green">104</FONT>         * @param nestable the Nestable implementation (&lt;i&gt;must&lt;/i&gt; extend<a name="line.104"></a>
<FONT color="green">105</FONT>         * {@link java.lang.Throwable})<a name="line.105"></a>
<FONT color="green">106</FONT>         * @since 2.0<a name="line.106"></a>
<FONT color="green">107</FONT>         */<a name="line.107"></a>
<FONT color="green">108</FONT>        public NestableDelegate(Nestable nestable) {<a name="line.108"></a>
<FONT color="green">109</FONT>            if (nestable instanceof Throwable) {<a name="line.109"></a>
<FONT color="green">110</FONT>                this.nestable = (Throwable) nestable;<a name="line.110"></a>
<FONT color="green">111</FONT>            } else {<a name="line.111"></a>
<FONT color="green">112</FONT>                throw new IllegalArgumentException(MUST_BE_THROWABLE);<a name="line.112"></a>
<FONT color="green">113</FONT>            }<a name="line.113"></a>
<FONT color="green">114</FONT>        }<a name="line.114"></a>
<FONT color="green">115</FONT>    <a name="line.115"></a>
<FONT color="green">116</FONT>        /**<a name="line.116"></a>
<FONT color="green">117</FONT>         * Returns the error message of the &lt;code&gt;Throwable&lt;/code&gt; in the chain of &lt;code&gt;Throwable&lt;/code&gt;s at the<a name="line.117"></a>
<FONT color="green">118</FONT>         * specified index, numbered from 0.<a name="line.118"></a>
<FONT color="green">119</FONT>         * <a name="line.119"></a>
<FONT color="green">120</FONT>         * @param index<a name="line.120"></a>
<FONT color="green">121</FONT>         *            the index of the &lt;code&gt;Throwable&lt;/code&gt; in the chain of &lt;code&gt;Throwable&lt;/code&gt;s<a name="line.121"></a>
<FONT color="green">122</FONT>         * @return the error message, or null if the &lt;code&gt;Throwable&lt;/code&gt; at the specified index in the chain does not<a name="line.122"></a>
<FONT color="green">123</FONT>         *         contain a message<a name="line.123"></a>
<FONT color="green">124</FONT>         * @throws IndexOutOfBoundsException<a name="line.124"></a>
<FONT color="green">125</FONT>         *             if the &lt;code&gt;index&lt;/code&gt; argument is negative or not less than the count of &lt;code&gt;Throwable&lt;/code&gt;s<a name="line.125"></a>
<FONT color="green">126</FONT>         *             in the chain<a name="line.126"></a>
<FONT color="green">127</FONT>         * @since 2.0<a name="line.127"></a>
<FONT color="green">128</FONT>         */<a name="line.128"></a>
<FONT color="green">129</FONT>        public String getMessage(int index) {<a name="line.129"></a>
<FONT color="green">130</FONT>            Throwable t = this.getThrowable(index);<a name="line.130"></a>
<FONT color="green">131</FONT>            if (Nestable.class.isInstance(t)) {<a name="line.131"></a>
<FONT color="green">132</FONT>                return ((Nestable) t).getMessage(0);<a name="line.132"></a>
<FONT color="green">133</FONT>            }<a name="line.133"></a>
<FONT color="green">134</FONT>            return t.getMessage();<a name="line.134"></a>
<FONT color="green">135</FONT>        }<a name="line.135"></a>
<FONT color="green">136</FONT>    <a name="line.136"></a>
<FONT color="green">137</FONT>        /**<a name="line.137"></a>
<FONT color="green">138</FONT>         * Returns the full message contained by the &lt;code&gt;Nestable&lt;/code&gt; and any nested &lt;code&gt;Throwable&lt;/code&gt;s.<a name="line.138"></a>
<FONT color="green">139</FONT>         * <a name="line.139"></a>
<FONT color="green">140</FONT>         * @param baseMsg<a name="line.140"></a>
<FONT color="green">141</FONT>         *            the base message to use when creating the full message. Should be generally be called via<a name="line.141"></a>
<FONT color="green">142</FONT>         *            &lt;code&gt;nestableHelper.getMessage(super.getMessage())&lt;/code&gt;, where &lt;code&gt;super&lt;/code&gt; is an<a name="line.142"></a>
<FONT color="green">143</FONT>         *            instance of {@link java.lang.Throwable}.<a name="line.143"></a>
<FONT color="green">144</FONT>         * @return The concatenated message for this and all nested &lt;code&gt;Throwable&lt;/code&gt;s<a name="line.144"></a>
<FONT color="green">145</FONT>         * @since 2.0<a name="line.145"></a>
<FONT color="green">146</FONT>         */<a name="line.146"></a>
<FONT color="green">147</FONT>        public String getMessage(String baseMsg) {<a name="line.147"></a>
<FONT color="green">148</FONT>            Throwable nestedCause = ExceptionUtils.getCause(this.nestable);<a name="line.148"></a>
<FONT color="green">149</FONT>            String causeMsg = nestedCause == null ? null : nestedCause.getMessage();<a name="line.149"></a>
<FONT color="green">150</FONT>            if (nestedCause == null || causeMsg == null) {<a name="line.150"></a>
<FONT color="green">151</FONT>                return baseMsg; // may be null, which is a valid result<a name="line.151"></a>
<FONT color="green">152</FONT>            }<a name="line.152"></a>
<FONT color="green">153</FONT>            if (baseMsg == null) {<a name="line.153"></a>
<FONT color="green">154</FONT>                return causeMsg;<a name="line.154"></a>
<FONT color="green">155</FONT>            }<a name="line.155"></a>
<FONT color="green">156</FONT>            return baseMsg + ": " + causeMsg;<a name="line.156"></a>
<FONT color="green">157</FONT>        }<a name="line.157"></a>
<FONT color="green">158</FONT>    <a name="line.158"></a>
<FONT color="green">159</FONT>        /**<a name="line.159"></a>
<FONT color="green">160</FONT>         * Returns the error message of this and any nested &lt;code&gt;Throwable&lt;/code&gt;s in an array of Strings, one element<a name="line.160"></a>
<FONT color="green">161</FONT>         * for each message. Any &lt;code&gt;Throwable&lt;/code&gt; not containing a message is represented in the array by a null.<a name="line.161"></a>
<FONT color="green">162</FONT>         * This has the effect of cause the length of the returned array to be equal to the result of the<a name="line.162"></a>
<FONT color="green">163</FONT>         * {@link #getThrowableCount()} operation.<a name="line.163"></a>
<FONT color="green">164</FONT>         * <a name="line.164"></a>
<FONT color="green">165</FONT>         * @return the error messages<a name="line.165"></a>
<FONT color="green">166</FONT>         * @since 2.0<a name="line.166"></a>
<FONT color="green">167</FONT>         */<a name="line.167"></a>
<FONT color="green">168</FONT>        public String[] getMessages() {<a name="line.168"></a>
<FONT color="green">169</FONT>            Throwable[] throwables = this.getThrowables();<a name="line.169"></a>
<FONT color="green">170</FONT>            String[] msgs = new String[throwables.length];<a name="line.170"></a>
<FONT color="green">171</FONT>            for (int i = 0; i &lt; throwables.length; i++) {<a name="line.171"></a>
<FONT color="green">172</FONT>                msgs[i] =<a name="line.172"></a>
<FONT color="green">173</FONT>                    (Nestable.class.isInstance(throwables[i])<a name="line.173"></a>
<FONT color="green">174</FONT>                        ? ((Nestable) throwables[i]).getMessage(0)<a name="line.174"></a>
<FONT color="green">175</FONT>                        : throwables[i].getMessage());<a name="line.175"></a>
<FONT color="green">176</FONT>            }<a name="line.176"></a>
<FONT color="green">177</FONT>            return msgs;<a name="line.177"></a>
<FONT color="green">178</FONT>        }<a name="line.178"></a>
<FONT color="green">179</FONT>    <a name="line.179"></a>
<FONT color="green">180</FONT>        /**<a name="line.180"></a>
<FONT color="green">181</FONT>         * Returns the &lt;code&gt;Throwable&lt;/code&gt; in the chain of<a name="line.181"></a>
<FONT color="green">182</FONT>         * &lt;code&gt;Throwable&lt;/code&gt;s at the specified index, numbered from 0.<a name="line.182"></a>
<FONT color="green">183</FONT>         *<a name="line.183"></a>
<FONT color="green">184</FONT>         * @param index the index, numbered from 0, of the &lt;code&gt;Throwable&lt;/code&gt; in<a name="line.184"></a>
<FONT color="green">185</FONT>         * the chain of &lt;code&gt;Throwable&lt;/code&gt;s<a name="line.185"></a>
<FONT color="green">186</FONT>         * @return the &lt;code&gt;Throwable&lt;/code&gt;<a name="line.186"></a>
<FONT color="green">187</FONT>         * @throws IndexOutOfBoundsException if the &lt;code&gt;index&lt;/code&gt; argument is<a name="line.187"></a>
<FONT color="green">188</FONT>         * negative or not less than the count of &lt;code&gt;Throwable&lt;/code&gt;s in the<a name="line.188"></a>
<FONT color="green">189</FONT>         * chain<a name="line.189"></a>
<FONT color="green">190</FONT>         * @since 2.0<a name="line.190"></a>
<FONT color="green">191</FONT>         */<a name="line.191"></a>
<FONT color="green">192</FONT>        public Throwable getThrowable(int index) {<a name="line.192"></a>
<FONT color="green">193</FONT>            if (index == 0) {<a name="line.193"></a>
<FONT color="green">194</FONT>                return this.nestable;<a name="line.194"></a>
<FONT color="green">195</FONT>            }<a name="line.195"></a>
<FONT color="green">196</FONT>            Throwable[] throwables = this.getThrowables();<a name="line.196"></a>
<FONT color="green">197</FONT>            return throwables[index];<a name="line.197"></a>
<FONT color="green">198</FONT>        }<a name="line.198"></a>
<FONT color="green">199</FONT>    <a name="line.199"></a>
<FONT color="green">200</FONT>        /**<a name="line.200"></a>
<FONT color="green">201</FONT>         * Returns the number of &lt;code&gt;Throwable&lt;/code&gt;s contained in the<a name="line.201"></a>
<FONT color="green">202</FONT>         * &lt;code&gt;Nestable&lt;/code&gt; contained by this delegate.<a name="line.202"></a>
<FONT color="green">203</FONT>         *<a name="line.203"></a>
<FONT color="green">204</FONT>         * @return the throwable count<a name="line.204"></a>
<FONT color="green">205</FONT>         * @since 2.0<a name="line.205"></a>
<FONT color="green">206</FONT>         */<a name="line.206"></a>
<FONT color="green">207</FONT>        public int getThrowableCount() {<a name="line.207"></a>
<FONT color="green">208</FONT>            return ExceptionUtils.getThrowableCount(this.nestable);<a name="line.208"></a>
<FONT color="green">209</FONT>        }<a name="line.209"></a>
<FONT color="green">210</FONT>    <a name="line.210"></a>
<FONT color="green">211</FONT>        /**<a name="line.211"></a>
<FONT color="green">212</FONT>         * Returns this delegate's &lt;code&gt;Nestable&lt;/code&gt; and any nested<a name="line.212"></a>
<FONT color="green">213</FONT>         * &lt;code&gt;Throwable&lt;/code&gt;s in an array of &lt;code&gt;Throwable&lt;/code&gt;s, one<a name="line.213"></a>
<FONT color="green">214</FONT>         * element for each &lt;code&gt;Throwable&lt;/code&gt;.<a name="line.214"></a>
<FONT color="green">215</FONT>         *<a name="line.215"></a>
<FONT color="green">216</FONT>         * @return the &lt;code&gt;Throwable&lt;/code&gt;s<a name="line.216"></a>
<FONT color="green">217</FONT>         * @since 2.0<a name="line.217"></a>
<FONT color="green">218</FONT>         */<a name="line.218"></a>
<FONT color="green">219</FONT>        public Throwable[] getThrowables() {<a name="line.219"></a>
<FONT color="green">220</FONT>            return ExceptionUtils.getThrowables(this.nestable);<a name="line.220"></a>
<FONT color="green">221</FONT>        }<a name="line.221"></a>
<FONT color="green">222</FONT>    <a name="line.222"></a>
<FONT color="green">223</FONT>        /**<a name="line.223"></a>
<FONT color="green">224</FONT>         * Returns the index, numbered from 0, of the first &lt;code&gt;Throwable&lt;/code&gt;<a name="line.224"></a>
<FONT color="green">225</FONT>         * that matches the specified type, or a subclass, in the chain of &lt;code&gt;Throwable&lt;/code&gt;s<a name="line.225"></a>
<FONT color="green">226</FONT>         * with an index greater than or equal to the specified index.<a name="line.226"></a>
<FONT color="green">227</FONT>         * The method returns -1 if the specified type is not found in the chain.<a name="line.227"></a>
<FONT color="green">228</FONT>         * &lt;p&gt;<a name="line.228"></a>
<FONT color="green">229</FONT>         * NOTE: From v2.1, we have clarified the &lt;code&gt;Nestable&lt;/code&gt; interface<a name="line.229"></a>
<FONT color="green">230</FONT>         * such that this method matches subclasses.<a name="line.230"></a>
<FONT color="green">231</FONT>         * If you want to NOT match subclasses, please use<a name="line.231"></a>
<FONT color="green">232</FONT>         * {@link ExceptionUtils#indexOfThrowable(Throwable, Class, int)}<a name="line.232"></a>
<FONT color="green">233</FONT>         * (which is avaiable in all versions of lang).<a name="line.233"></a>
<FONT color="green">234</FONT>         * An alternative is to use the public static flag {@link #matchSubclasses}<a name="line.234"></a>
<FONT color="green">235</FONT>         * on &lt;code&gt;NestableDelegate&lt;/code&gt;, however this is not recommended.<a name="line.235"></a>
<FONT color="green">236</FONT>         *<a name="line.236"></a>
<FONT color="green">237</FONT>         * @param type  the type to find, subclasses match, null returns -1<a name="line.237"></a>
<FONT color="green">238</FONT>         * @param fromIndex the index, numbered from 0, of the starting position in<a name="line.238"></a>
<FONT color="green">239</FONT>         * the chain to be searched<a name="line.239"></a>
<FONT color="green">240</FONT>         * @return index of the first occurrence of the type in the chain, or -1 if<a name="line.240"></a>
<FONT color="green">241</FONT>         * the type is not found<a name="line.241"></a>
<FONT color="green">242</FONT>         * @throws IndexOutOfBoundsException if the &lt;code&gt;fromIndex&lt;/code&gt; argument<a name="line.242"></a>
<FONT color="green">243</FONT>         * is negative or not less than the count of &lt;code&gt;Throwable&lt;/code&gt;s in the<a name="line.243"></a>
<FONT color="green">244</FONT>         * chain<a name="line.244"></a>
<FONT color="green">245</FONT>         * @since 2.0<a name="line.245"></a>
<FONT color="green">246</FONT>         */<a name="line.246"></a>
<FONT color="green">247</FONT>        public int indexOfThrowable(Class type, int fromIndex) {<a name="line.247"></a>
<FONT color="green">248</FONT>            if (type == null) {<a name="line.248"></a>
<FONT color="green">249</FONT>                return -1;<a name="line.249"></a>
<FONT color="green">250</FONT>            }<a name="line.250"></a>
<FONT color="green">251</FONT>            if (fromIndex &lt; 0) {<a name="line.251"></a>
<FONT color="green">252</FONT>                throw new IndexOutOfBoundsException("The start index was out of bounds: " + fromIndex);<a name="line.252"></a>
<FONT color="green">253</FONT>            }<a name="line.253"></a>
<FONT color="green">254</FONT>            Throwable[] throwables = ExceptionUtils.getThrowables(this.nestable);<a name="line.254"></a>
<FONT color="green">255</FONT>            if (fromIndex &gt;= throwables.length) {<a name="line.255"></a>
<FONT color="green">256</FONT>                throw new IndexOutOfBoundsException("The start index was out of bounds: "<a name="line.256"></a>
<FONT color="green">257</FONT>                    + fromIndex + " &gt;= " + throwables.length);<a name="line.257"></a>
<FONT color="green">258</FONT>            }<a name="line.258"></a>
<FONT color="green">259</FONT>            if (matchSubclasses) {<a name="line.259"></a>
<FONT color="green">260</FONT>                for (int i = fromIndex; i &lt; throwables.length; i++) {<a name="line.260"></a>
<FONT color="green">261</FONT>                    if (type.isAssignableFrom(throwables[i].getClass())) {<a name="line.261"></a>
<FONT color="green">262</FONT>                        return i;<a name="line.262"></a>
<FONT color="green">263</FONT>                    }<a name="line.263"></a>
<FONT color="green">264</FONT>                }<a name="line.264"></a>
<FONT color="green">265</FONT>            } else {<a name="line.265"></a>
<FONT color="green">266</FONT>                for (int i = fromIndex; i &lt; throwables.length; i++) {<a name="line.266"></a>
<FONT color="green">267</FONT>                    if (type.equals(throwables[i].getClass())) {<a name="line.267"></a>
<FONT color="green">268</FONT>                        return i;<a name="line.268"></a>
<FONT color="green">269</FONT>                    }<a name="line.269"></a>
<FONT color="green">270</FONT>                }<a name="line.270"></a>
<FONT color="green">271</FONT>            }<a name="line.271"></a>
<FONT color="green">272</FONT>            return -1;<a name="line.272"></a>
<FONT color="green">273</FONT>        }<a name="line.273"></a>
<FONT color="green">274</FONT>    <a name="line.274"></a>
<FONT color="green">275</FONT>        /**<a name="line.275"></a>
<FONT color="green">276</FONT>         * Prints the stack trace of this exception the the standar error<a name="line.276"></a>
<FONT color="green">277</FONT>         * stream.<a name="line.277"></a>
<FONT color="green">278</FONT>         */<a name="line.278"></a>
<FONT color="green">279</FONT>        public void printStackTrace() {<a name="line.279"></a>
<FONT color="green">280</FONT>            printStackTrace(System.err);<a name="line.280"></a>
<FONT color="green">281</FONT>        }<a name="line.281"></a>
<FONT color="green">282</FONT>    <a name="line.282"></a>
<FONT color="green">283</FONT>        /**<a name="line.283"></a>
<FONT color="green">284</FONT>         * Prints the stack trace of this exception to the specified<a name="line.284"></a>
<FONT color="green">285</FONT>         * stream.<a name="line.285"></a>
<FONT color="green">286</FONT>         *<a name="line.286"></a>
<FONT color="green">287</FONT>         * @param out &lt;code&gt;PrintStream&lt;/code&gt; to use for output.<a name="line.287"></a>
<FONT color="green">288</FONT>         * @see #printStackTrace(PrintWriter)<a name="line.288"></a>
<FONT color="green">289</FONT>         */<a name="line.289"></a>
<FONT color="green">290</FONT>        public void printStackTrace(PrintStream out) {<a name="line.290"></a>
<FONT color="green">291</FONT>            synchronized (out) {<a name="line.291"></a>
<FONT color="green">292</FONT>                PrintWriter pw = new PrintWriter(out, false);<a name="line.292"></a>
<FONT color="green">293</FONT>                printStackTrace(pw);<a name="line.293"></a>
<FONT color="green">294</FONT>                // Flush the PrintWriter before it's GC'ed.<a name="line.294"></a>
<FONT color="green">295</FONT>                pw.flush();<a name="line.295"></a>
<FONT color="green">296</FONT>            }<a name="line.296"></a>
<FONT color="green">297</FONT>        }<a name="line.297"></a>
<FONT color="green">298</FONT>    <a name="line.298"></a>
<FONT color="green">299</FONT>        /**<a name="line.299"></a>
<FONT color="green">300</FONT>         * Prints the stack trace of this exception to the specified<a name="line.300"></a>
<FONT color="green">301</FONT>         * writer. If the Throwable class has a &lt;code&gt;getCause&lt;/code&gt;<a name="line.301"></a>
<FONT color="green">302</FONT>         * method (i.e. running on jre1.4 or higher), this method just <a name="line.302"></a>
<FONT color="green">303</FONT>         * uses Throwable's printStackTrace() method. Otherwise, generates<a name="line.303"></a>
<FONT color="green">304</FONT>         * the stack-trace, by taking into account the 'topDown' and <a name="line.304"></a>
<FONT color="green">305</FONT>         * 'trimStackFrames' parameters. The topDown and trimStackFrames <a name="line.305"></a>
<FONT color="green">306</FONT>         * are set to 'true' by default (produces jre1.4-like stack trace).<a name="line.306"></a>
<FONT color="green">307</FONT>         *<a name="line.307"></a>
<FONT color="green">308</FONT>         * @param out &lt;code&gt;PrintWriter&lt;/code&gt; to use for output.<a name="line.308"></a>
<FONT color="green">309</FONT>         */<a name="line.309"></a>
<FONT color="green">310</FONT>        public void printStackTrace(PrintWriter out) {<a name="line.310"></a>
<FONT color="green">311</FONT>            Throwable throwable = this.nestable;<a name="line.311"></a>
<FONT color="green">312</FONT>            // if running on jre1.4 or higher, use default printStackTrace<a name="line.312"></a>
<FONT color="green">313</FONT>            if (ExceptionUtils.isThrowableNested()) {<a name="line.313"></a>
<FONT color="green">314</FONT>                if (throwable instanceof Nestable) {<a name="line.314"></a>
<FONT color="green">315</FONT>                    ((Nestable)throwable).printPartialStackTrace(out);<a name="line.315"></a>
<FONT color="green">316</FONT>                } else {<a name="line.316"></a>
<FONT color="green">317</FONT>                    throwable.printStackTrace(out);<a name="line.317"></a>
<FONT color="green">318</FONT>                }<a name="line.318"></a>
<FONT color="green">319</FONT>                return;<a name="line.319"></a>
<FONT color="green">320</FONT>            }<a name="line.320"></a>
<FONT color="green">321</FONT>    <a name="line.321"></a>
<FONT color="green">322</FONT>            // generating the nested stack trace<a name="line.322"></a>
<FONT color="green">323</FONT>            List stacks = new ArrayList();<a name="line.323"></a>
<FONT color="green">324</FONT>            while (throwable != null) {<a name="line.324"></a>
<FONT color="green">325</FONT>                String[] st = getStackFrames(throwable);<a name="line.325"></a>
<FONT color="green">326</FONT>                stacks.add(st);<a name="line.326"></a>
<FONT color="green">327</FONT>                throwable = ExceptionUtils.getCause(throwable);<a name="line.327"></a>
<FONT color="green">328</FONT>            }<a name="line.328"></a>
<FONT color="green">329</FONT>    <a name="line.329"></a>
<FONT color="green">330</FONT>            // If NOT topDown, reverse the stack<a name="line.330"></a>
<FONT color="green">331</FONT>            String separatorLine = "Caused by: ";<a name="line.331"></a>
<FONT color="green">332</FONT>            if (!topDown) {<a name="line.332"></a>
<FONT color="green">333</FONT>                separatorLine = "Rethrown as: ";<a name="line.333"></a>
<FONT color="green">334</FONT>                Collections.reverse(stacks);<a name="line.334"></a>
<FONT color="green">335</FONT>            }<a name="line.335"></a>
<FONT color="green">336</FONT>    <a name="line.336"></a>
<FONT color="green">337</FONT>            // Remove the repeated lines in the stack<a name="line.337"></a>
<FONT color="green">338</FONT>            if (trimStackFrames) {<a name="line.338"></a>
<FONT color="green">339</FONT>              trimStackFrames(stacks);<a name="line.339"></a>
<FONT color="green">340</FONT>            }<a name="line.340"></a>
<FONT color="green">341</FONT>    <a name="line.341"></a>
<FONT color="green">342</FONT>            synchronized (out) {<a name="line.342"></a>
<FONT color="green">343</FONT>                for (Iterator iter=stacks.iterator(); iter.hasNext();) {<a name="line.343"></a>
<FONT color="green">344</FONT>                    String[] st = (String[]) iter.next();<a name="line.344"></a>
<FONT color="green">345</FONT>                    for (int i=0, len=st.length; i &lt; len; i++) {<a name="line.345"></a>
<FONT color="green">346</FONT>                        out.println(st[i]);<a name="line.346"></a>
<FONT color="green">347</FONT>                    }<a name="line.347"></a>
<FONT color="green">348</FONT>                    if (iter.hasNext()) {<a name="line.348"></a>
<FONT color="green">349</FONT>                        out.print(separatorLine);<a name="line.349"></a>
<FONT color="green">350</FONT>                    }<a name="line.350"></a>
<FONT color="green">351</FONT>                }<a name="line.351"></a>
<FONT color="green">352</FONT>            }<a name="line.352"></a>
<FONT color="green">353</FONT>        }<a name="line.353"></a>
<FONT color="green">354</FONT>    <a name="line.354"></a>
<FONT color="green">355</FONT>        /**<a name="line.355"></a>
<FONT color="green">356</FONT>         * Captures the stack trace associated with the specified<a name="line.356"></a>
<FONT color="green">357</FONT>         * &lt;code&gt;Throwable&lt;/code&gt; object, decomposing it into a list of<a name="line.357"></a>
<FONT color="green">358</FONT>         * stack frames.<a name="line.358"></a>
<FONT color="green">359</FONT>         *<a name="line.359"></a>
<FONT color="green">360</FONT>         * @param t The &lt;code&gt;Throwable&lt;/code&gt;.<a name="line.360"></a>
<FONT color="green">361</FONT>         * @return  An array of strings describing each stack frame.<a name="line.361"></a>
<FONT color="green">362</FONT>         * @since 2.0<a name="line.362"></a>
<FONT color="green">363</FONT>         */<a name="line.363"></a>
<FONT color="green">364</FONT>        protected String[] getStackFrames(Throwable t) {<a name="line.364"></a>
<FONT color="green">365</FONT>            StringWriter sw = new StringWriter();<a name="line.365"></a>
<FONT color="green">366</FONT>            PrintWriter pw = new PrintWriter(sw, true);<a name="line.366"></a>
<FONT color="green">367</FONT>    <a name="line.367"></a>
<FONT color="green">368</FONT>            // Avoid infinite loop between decompose() and printStackTrace().<a name="line.368"></a>
<FONT color="green">369</FONT>            if (t instanceof Nestable) {<a name="line.369"></a>
<FONT color="green">370</FONT>                ((Nestable) t).printPartialStackTrace(pw);<a name="line.370"></a>
<FONT color="green">371</FONT>            } else {<a name="line.371"></a>
<FONT color="green">372</FONT>                t.printStackTrace(pw);<a name="line.372"></a>
<FONT color="green">373</FONT>            }<a name="line.373"></a>
<FONT color="green">374</FONT>            return ExceptionUtils.getStackFrames(sw.getBuffer().toString());<a name="line.374"></a>
<FONT color="green">375</FONT>        }<a name="line.375"></a>
<FONT color="green">376</FONT>        <a name="line.376"></a>
<FONT color="green">377</FONT>        /**<a name="line.377"></a>
<FONT color="green">378</FONT>         * Trims the stack frames. The first set is left untouched. The rest<a name="line.378"></a>
<FONT color="green">379</FONT>         * of the frames are truncated from the bottom by comparing with<a name="line.379"></a>
<FONT color="green">380</FONT>         * one just on top.<a name="line.380"></a>
<FONT color="green">381</FONT>         *<a name="line.381"></a>
<FONT color="green">382</FONT>         * @param stacks The list containing String[] elements<a name="line.382"></a>
<FONT color="green">383</FONT>         * @since 2.0<a name="line.383"></a>
<FONT color="green">384</FONT>         */<a name="line.384"></a>
<FONT color="green">385</FONT>        protected void trimStackFrames(List stacks) {<a name="line.385"></a>
<FONT color="green">386</FONT>             for (int size=stacks.size(), i=size-1; i &gt; 0; i--) {<a name="line.386"></a>
<FONT color="green">387</FONT>                 String[] curr = (String[]) stacks.get(i);<a name="line.387"></a>
<FONT color="green">388</FONT>                 String[] next = (String[]) stacks.get(i-1); <a name="line.388"></a>
<FONT color="green">389</FONT>                 <a name="line.389"></a>
<FONT color="green">390</FONT>                 List currList = new ArrayList(Arrays.asList(curr));<a name="line.390"></a>
<FONT color="green">391</FONT>                 List nextList = new ArrayList(Arrays.asList(next));<a name="line.391"></a>
<FONT color="green">392</FONT>                 ExceptionUtils.removeCommonFrames(currList, nextList);<a name="line.392"></a>
<FONT color="green">393</FONT>    <a name="line.393"></a>
<FONT color="green">394</FONT>                 int trimmed = curr.length - currList.size();<a name="line.394"></a>
<FONT color="green">395</FONT>                 if (trimmed &gt; 0) {<a name="line.395"></a>
<FONT color="green">396</FONT>                     currList.add("\t... "+trimmed+" more");<a name="line.396"></a>
<FONT color="green">397</FONT>                     stacks.set(<a name="line.397"></a>
<FONT color="green">398</FONT>                         i, <a name="line.398"></a>
<FONT color="green">399</FONT>                         currList.toArray(new String[currList.size()])<a name="line.399"></a>
<FONT color="green">400</FONT>                     );<a name="line.400"></a>
<FONT color="green">401</FONT>                 }<a name="line.401"></a>
<FONT color="green">402</FONT>             }<a name="line.402"></a>
<FONT color="green">403</FONT>         }<a name="line.403"></a>
<FONT color="green">404</FONT>    }<a name="line.404"></a>




























































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